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Avalanche Forecast

Archived

Mar 7th, 2026–Mar 8th, 2026

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Heavy snowfall overnight and strong - extreme wind will keep the hazard high on Sunday.

Patience is required as we see how the persistent slab problem reacts to the additional loading.

See the Avalanche Canada blog post for an info on persistent slab conditions.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

Wet loose natural avalanches up to size 2 observed below tree line in the highway corridor on Saturday.

Limited explosive testing on Friday produced one size 3 avalanche on the west end of the park.

Natural avalanche activity has slowed down. See the Avalanche Canada blog post for info on dealing with persistent slab problems. We are entering the "healing' stage. Avalanches are becoming less likely but the consequence will remain massive for the foreseeable future.

Snowpack Summary

Approx. 50cm of recent storm snow has been redistributed by strong - extreme westerly wind creating wind slabs.

The Feb 9 surface hoar (SH) is down 90-120 cm and remains reactive in snowpack testing. The Feb 9 SH sits over a crust on solar aspects.

The Jan 26th layer is buried down 130-160 cm, and is composed of very large surface hoar (up to 40mm), facets, and/or a crust, The largest surface hoar is preserved in sheltered areas below treeline.

Weather Summary

Freezing levels are dropping Sun morning.

Tonight Snow, 16cm. Alpine low -3°C. Freezing level (FZL) 1600m. Wind SW 25 gusting to 80km/h.

Sun Scattered flurries, 5cm. High -4°C. FZL 1400m. Wind West 15 gusting 80km/h.

Mon Isolated flurries, trace precipitation. High -11°C. Wind SW 15 gusting to 50km/h. FZL valley bottom.

Tues Scattered flurries, 4cm. High -12°C. FZL 500m. Wind SW 15 gusting to 50.

Terrain and Travel Advice

  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.